noun, Anatomy. 1. either of a pair of nerves, the largest in the body, that originate in the sacral plexus of the lower back and extend down the buttocks to the back of the knees, where they divide into other nerves: the sciatic nerve and its branches innervate large areas of the pelvis, leg, and […]

noun 1. a form of fiction that draws imaginatively on scientific knowledge and speculation in its plot, setting, theme, etc. science fiction noun 1. a literary genre that makes imaginative use of scientific knowledge or conjecture (as modifier): a science fiction writer science fiction definition Works of fiction that use scientific discoveries or advanced technology […]

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